A:
Positive:
1 x 712383111 x 64762113 x 54798731 x 229801143 x 49817341 x 20891403 x 176771607 x 4433
Negative:
-1 x -7123831-11 x -647621-13 x -547987-31 x -229801-143 x -49817-341 x -20891-403 x -17677-1607 x -4433
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 7,123,831, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 7,123,831 | |
| -1 | -7,123,831 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,123,831.
Example:
1 x 7,123,831 = 7,123,831
and
-1 x -7,123,831 = 7,123,831
Notice both answers equal 7,123,831
With that explanation out of the way, let's continue. Next, we take the number 7,123,831 and divide it by 2:
7,123,831 ÷ 2 = 3,561,915.5
If the quotient is a whole number, then 2 and 3,561,915.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 7,123,831 | |
| -1 | -7,123,831 |
Now, we try dividing 7,123,831 by 3:
7,123,831 ÷ 3 = 2,374,610.3333
If the quotient is a whole number, then 3 and 2,374,610.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 7,123,831 | |
| -1 | -7,123,831 |
Let's try dividing by 4:
7,123,831 ÷ 4 = 1,780,957.75
If the quotient is a whole number, then 4 and 1,780,957.75 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 7,123,831 | |
| -1 | 7,123,831 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 31 | 143 | 341 | 403 | 1,607 | 4,433 | 17,677 | 20,891 | 49,817 | 229,801 | 547,987 | 647,621 | 7,123,831 |
| -1 | -11 | -13 | -31 | -143 | -341 | -403 | -1,607 | -4,433 | -17,677 | -20,891 | -49,817 | -229,801 | -547,987 | -647,621 | -7,123,831 |
Here are some more numbers to try:
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